package com.example.demo9.utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.Reader;

public class MybatisUtils {  //产生sqlSession对象的    设计模式--工厂模式
    private static SqlSessionFactory sqlSessionFactory = null;
    static {   //设计模式----单例模式
        try {
            Reader reader =
                    Resources.getResourceAsReader("mybatis-config.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static SqlSession getSession() {
        return sqlSessionFactory.openSession();
    }
}
